Quoted
Varna-class, Bulgarian Flotilla Cruiser laid down 1946
Displacement:
4,134 t light; 4,499 t standard; 5,202 t normal; 5,764 t full load
Dimensions: Length overall / water x beam x draught
475.72 ft / 475.72 ft x 47.57 ft x 15.42 ft (normal load)
145.00 m / 145.00 m x 14.50 m x 4.70 m
Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 79.37lbs / 36.00kg shells, 1946 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 2.24" / 57.0 mm guns (4x2 guns), 6.61lbs / 3.00kg shells, 1946 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
16 - 0.91" / 23.0 mm guns (8x2 guns), 0.37lbs / 0.17kg shells, 1946 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 694 lbs / 315 kg
Shells per gun, main battery: 650
12 - 25.6" / 650 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.57" / 40 mm 262.47 ft / 80.00 m 9.84 ft / 3.00 m
Ends: 0.79" / 20 mm 147.64 ft / 45.00 m 9.84 ft / 3.00 m
65.62 ft / 20.00 m Unarmoured ends
Main Belt covers 85 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.38" / 35 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
3rd: 0.59" / 15 mm 0.20" / 5 mm -
- Conning tower: 1.38" / 35 mm
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 69,064 shp / 51,522 Kw = 34.00 kts
Range 6,500nm at 18.00 kts
Bunker at max displacement = 1,265 tons
Complement:
306 - 398
Cost:
£3.262 million / $13.049 million
Distribution of weights at normal displacement:
Armament: 88 tons, 1.7 %
Armour: 259 tons, 5.0 %
- Belts: 216 tons, 4.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 34 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 9 tons, 0.2 %
Machinery: 1,725 tons, 33.2 %
Hull, fittings & equipment: 1,711 tons, 32.9 %
Fuel, ammunition & stores: 1,068 tons, 20.5 %
Miscellaneous weights: 350 tons, 6.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,143 lbs / 1,425 Kg = 46.9 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.0 ft / 0.6 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.53
Seaboat quality (Average = 1.00): 1.06
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.522
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 24.83 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (30 %): 23.79 ft / 7.25 m
- Mid (60 %): 22.97 ft / 7.00 m (13.94 ft / 4.25 m aft of break)
- Quarterdeck (15 %): 13.94 ft / 4.25 m
- Stern: 13.94 ft / 4.25 m
- Average freeboard: 19.82 ft / 6.04 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 132.0 %
- Above water (accommodation/working, high = better): 87.0 %
Waterplane Area: 16,005 Square feet or 1,487 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 60 lbs/sq ft or 293 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.68
- Longitudinal: 1.81
- Overall: 0.75
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Breakdown of Miscellaneous Weights:
Not yet determined.
Ships in Class:
- Varna
- Plovdiv
- Stara Zagora
- Burgas
4500 tons is the upper limit for a hull strength of 0.75 so according to the rules it should be okay. I do agree with speed and the expensiveness to get that speed.
There's no fault, per se, in the design; I just have concerns - and I suspect that if the bow angle were changed to something beyond 1914-vintage - some of the concerns might disappear.
There's no fault, per se, in the design; I just have concerns - and I suspect that if the bow angle were changed to something beyond 1914-vintage - some of the concerns might disappear.
Bow angle doesn't change anything in the design - with SS2, it's just a cosmetic thing. And yes, that 0-deg angle was an oversight that I need to fix. I did notice one other thing I want to tweak about the sim, too.
I might try turning some of the miscellaneous weight into deck armour, but I don't really see much need for it. This design, like the Yugoslavian flotilla cruisers I'm cribbing from, is all about the speed and the firepower. Frankly, I considered removing the armour entirely, since it's not really enough to do any good.
As to the comments about hull strength, why is there such concern about it being "low"?
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